IMPORTANT: El repositori està en manteniment des del dia 28 de Novembre fins al 3 de Desembre, només es pot consultar, però no afegir contingut. Disculpeu les molèsties
The triple collinear limit of one-loop QCD amplitudes
Show full item record
|
View
 (143.2Kb)
|
|
|
|
|
|
|
Catani, Stefano; de Florian, Daniel; Rodrigo García, Germán Vicente
|
|
This document is a artículoDate2004
|
|
|
|
We consider the singular behaviour of one-loop QCD matrix elements when several external partons become simultaneously parallel. We present a new factorization formula that describes the singular collinear behaviour directly in colour space. The collinear singularities are embodied in process-independent splitting matrices that depend on the momenta, flavours, spins and colours of the collinear partons. We give the general structure of the infrared and ultraviolet divergences of the one-loop splitting matrices. We also present explicit one-loop results for the triple collinear splitting, q→qQ¯Q, of a quark and a quark--antiquark pair of different flavours. The one-loop triple collinear splitting is one of the ingredients that can be used to compute the evolution of parton distributions at the next-to-next-to-leading order in QCD perturbation theory. |
|
|
Ver en el catálogo Trobes
|
|
|
This item appears in the following Collection(s)
Show full item record
Search DSpace
Browse
-
All of DSpace
-
This Collection
Statistics
